New mom Hilary Duff has beefed up her exercise regime since giving birth to her son last month following a series of jibes about her weight. The singer/actress gave birth to daughter Luca on 20 March and she’s now desperately trying to lose the baby weight.

The So Yesterday singer reveals she didn’t waste any time in getting back to the gym – because she has been subjected to harsh criticism about her new curves.

She tells Parade magazine, “I read comments on my Twitter page about how I’m waddling into pilates and I go, ‘Wow, that’s a really mean thing to say. I just had a baby three weeks ago!’ There is a little bit of pressure but most of it comes from me.”

However, Duff refuses to let the mean comments get her down for too long: “You can appreciate all of your imperfections because you have a beautiful baby who came from you, and all that you went through.”